[2] In October 1862, the 14th NH arrived in Washington, D.C., where it camped on East Capitol Hill before establishing winter quarters at Poolesville, Maryland.
From November 1862 to April 1863, the 14th NH served picket duty along the upper Potomac River.
In April 1863, the regiment moved its quarters to Camp Adirondack, in northeast Washington D.C. From April 1863 to the end of the year, the 14th NH performed guard duty at Old Capitol Prison, transporting prisoners and deserters, and at the Navy Yard Bridge (Benning's Bridge).
On March 16, 1864, the 14th N.H. departed for Louisiana to participate in the Red River Campaign, but arrived after it had ended.
The regiment served at Camp Parapet, Carrollton, and Jefferson City until June 1864, when they returned to Virginia.